Actively exploited in the wild
Apache Log4j2 Remote Code Execution Vulnerability
Apache - Log4j2 · Listed in the CISA KEV since 2021-12-10. This indicates confirmed attacks in production environments.
Required action: For all affected software assets for which updates exist, the only acceptable remediation actions are: 1) Apply updates; OR 2) remove affected assets from agency networks. Temporary mitigations using one of the measures provided at https://www.cisa.gov/uscert/ed-22-02-apache-log4j-recommended-mitigation-measures are only acceptable until updates are available.
CVE-2021-44228
CriticalCVSS 10.0KEVExploitation Probability (EPSS)
Very high risk100th percentile - higher than 100% of all known CVEs
Summary
Podatność w Apache Log4j2 (w wersjach od 2.0-beta9 do 2.15.0, z wyjątkiem wydań zabezpieczeń 2.12.2, 2.12.3 i 2.3.1) pozwala atakującym na wykonanie dowolnego kodu poprzez kontrolowane przez nich wiadomości logów i parametry, gdy włączona jest substytucja wyszukiwania wiadomości. Od wersji 2.15.0 to zachowanie zostało domyślnie wyłączone, a w wersji 2.16.0 całkowicie usunięte.
Risk Assessment
Organizacje mogą być narażone na zdalne wykonanie kodu, co może prowadzić do poważnych naruszeń bezpieczeństwa i utraty danych. Atakujący mogą wykorzystać tę podatność do przejęcia kontroli nad systemami korzystającymi z podatnych wersji Log4j.
Recommendation
Zaleca się aktualizację do wersji Log4j 2.16.0 lub nowszej, aby usunąć tę podatność. W przypadku niemożności aktualizacji, należy wyłączyć funkcjonalność JNDI w używanych wersjach Log4j.
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Original NVD description (English source)
Apache Log4j2 2.0-beta9 through 2.15.0 (excluding security releases 2.12.2, 2.12.3, and 2.3.1) JNDI features used in configuration, log messages, and parameters do not protect against attacker controlled LDAP and other JNDI related endpoints. An attacker who can control log messages or log message parameters can execute arbitrary code loaded from LDAP servers when message lookup substitution is enabled. From log4j 2.15.0, this behavior has been disabled by default. From version 2.16.0 (along with 2.12.2, 2.12.3, and 2.3.1), this functionality has been completely removed. Note that this vulnerability is specific to log4j-core and does not affect log4net, log4cxx, or other Apache Logging Services projects.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS

